netdev - Re: [PATCH RESEND] bnx2x: fix crash during TSO tunneling

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Message-ID: <1406219874.3363.71.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 24 Jul 2014 18:37:54 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Dmitry Kravkov <dkravkov@...il.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, ypei@...hat.com,
	mschmidt@...hat.com, Dmitry Kravkov <Dmitry.Kravkov@...gic.com>
Subject: Re: [PATCH RESEND] bnx2x: fix crash during TSO tunneling

On Thu, 2014-07-24 at 18:54 +0300, Dmitry Kravkov wrote:
> From: Dmitry Kravkov <Dmitry.Kravkov@...gic.com>
> 
> When TSO packet is transmitted additional BD w/o mapping is used
> to describe the packed. The BD needs special handling in tx
> completion.
> 
> kernel: Call Trace:
> kernel: <IRQ>  [<ffffffff815e19ba>] dump_stack+0x19/0x1b
> kernel: [<ffffffff8105dee1>] warn_slowpath_common+0x61/0x80
> kernel: [<ffffffff8105df5c>] warn_slowpath_fmt+0x5c/0x80
> kernel: [<ffffffff814a8c0d>] ? find_iova+0x4d/0x90
> kernel: [<ffffffff814ab0e2>] intel_unmap_page.part.36+0x142/0x160
> kernel: [<ffffffff814ad0e6>] intel_unmap_page+0x26/0x30
> kernel: [<ffffffffa01f55d7>] bnx2x_free_tx_pkt+0x157/0x2b0 [bnx2x]
> kernel: [<ffffffffa01f8dac>] bnx2x_tx_int+0xac/0x220 [bnx2x]
> kernel: [<ffffffff8101a0d9>] ? read_tsc+0x9/0x20
> kernel: [<ffffffffa01f8fdb>] bnx2x_poll+0xbb/0x3c0 [bnx2x]
> kernel: [<ffffffff814d041a>] net_rx_action+0x15a/0x250
> kernel: [<ffffffff81067047>] __do_softirq+0xf7/0x290
> kernel: [<ffffffff815f3a5c>] call_softirq+0x1c/0x30
> kernel: [<ffffffff81014d25>] do_softirq+0x55/0x90
> kernel: [<ffffffff810673e5>] irq_exit+0x115/0x120
> kernel: [<ffffffff815f4358>] do_IRQ+0x58/0xf0
> kernel: [<ffffffff815e94ad>] common_interrupt+0x6d/0x6d
> kernel: <EOI>  [<ffffffff810bbff7>] ? clockevents_notify+0x127/0x140
> kernel: [<ffffffff814834df>] ? cpuidle_enter_state+0x4f/0xc0
> kernel: [<ffffffff81483615>] cpuidle_idle_call+0xc5/0x200
> kernel: [<ffffffff8101bc7e>] arch_cpu_idle+0xe/0x30
> kernel: [<ffffffff810b4725>] cpu_startup_entry+0xf5/0x290
> kernel: [<ffffffff815cfee1>] start_secondary+0x265/0x27b
> kernel: ---[ end trace 11aa7726f18d7e80 ]---
> 
> Reported-by: Yulong Pei <ypei@...hat.com>
> Cc: Michal Schmidt <mschmidt@...hat.com>
> Signed-off-by: Dmitry Kravkov <Dmitry.Kravkov@...gic.com>
> ---

How old is this bug ? Can you point original commit adding it ?

Thanks !


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